side opining, by using quadrupole-link-shaped constitution to support the door; automatically closes the outflow side opening when the level of water rises abnormally, as when water flows in from a main river; and is easy to maintain and control while requiring low constructing and running ...
Auto Furappuge - ToPROBLEM TO BE SOLVED: To provide an automatic flap gate which stably opens an outflow-side opening in a sluice box, without increasing the open angle of a door which opens and closes the outflow side opining, by using quadrupole-link-shaped constitution to support the...